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    SCALABILITY TECHNIQUES BASED ON CONTENT INFORMATION
    31.
    发明专利
    SCALABILITY TECHNIQUES BASED ON CONTENT INFORMATION 未知

    公开(公告)号：CA2623929A1

    公开(公告)日：2007-04-05

    申请号：CA2623929

    申请日：2006-09-27

    Applicant: QUALCOMM INC

    Inventor： WALKER GORDON KENT ,  BHAMIDIPATI PHANIKUMAR ,  TIAN TAO ,  CHEN PEISONG ,  SHI FANG ,  RAVEENDRAN VIJAYALAKSHMI R ,  OGUZ SEYFULLAH HALIT ,  SUBRAMANIA SITARAMAN GANAPATHY

    IPC: H04N7/26 ,  H04N5/44 ,  H04N19/89

    Abstract: Apparatus and methods of using content information for encoding multimedia data are described. A method of processing multimedia data includes classifying content of multimedia data, and encoding the multimedia data in a first data group and in a second data group based on the content classification, wherein the first data group comprises a coefficient and the second data group comprises a first differential refinement associated with the first data group coefficient. An apparatus for using content information for encoding multimedia data includes a content classifying module configured to classify content of multimedia data and provide content classification data, and an encoder configured to encode the multimedia data in a first data group and in a second data group based on the content classification, wherein the first data group comprises a coefficient and the second data group comprises a first differential refinement associated with the first data group coefficient

    Context-adaptive bandwidth adjustment in video rate control
    32.
    发明专利
    Context-adaptive bandwidth adjustment in video rate control 未知

    公开(公告)号：AU2006223420A1

    公开(公告)日：2006-09-21

    申请号：AU2006223420

    申请日：2006-03-10

    Applicant: QUALCOMM INC

    Inventor： TIAN TAO ,  RAVEENDRAN VIJAYALAKSHMI R

    IPC: H04N7/26 ,  G06T9/00 ,  H04N7/30 ,  H04N7/50

    Abstract: Methods and apparatus encode video at a targeted bit rate and yet permit variation of a Quantization Parameter (QP) to encode video of varying complexity with relatively consistent visual quality. Constant bit rate (CBR) encoding is desirable in many applications, such as in transmission or broadcasting environments. However, conventional CBR techniques compromise visual quality. Disclosed techniques permit adaptive variation in a QP value and provide the improved visual encoding available in variable bit rate (VBR) schemes while maintaining enough adherence to a targeted bit rate to be applicable to CBR environments.

    Frame structure for mixed-rate wireless communication networks
    33.
    发明专利
    Frame structure for mixed-rate wireless communication networks 未知

    公开(公告)号：AU2015318053A1

    公开(公告)日：2017-03-02

    申请号：AU2015318053

    申请日：2015-09-14

    Applicant: QUALCOMM INC

    Inventor： TIAN BIN ,  TIAN TAO ,  VERMANI SAMEER ,  REBEIZ ERIC PIERRE ,  DOAN DUNG NGOC ,  YANG LIN ,  TANDRA RAHUL

    IPC: H04L27/26

    Abstract: A method of wirelessly communicating a packet including a first portion for transmission over at least one channel of a first transmission type and a second portion for transmission over at least one channel of a second transmission type. In one aspect, the method includes generating, at a wireless device, a packet including a first portion having a first symbol duration. The packet further includes a second portion having a second symbol duration greater than the first. The second portion can include a plurality of repeated portions of the signal field, the repeated portions having the second symbol duration. The first portion includes a first training field. The method further includes prepending or appending a second training field to the first portion. The second training field has the second symbol duration. The method further includes transmitting the packet.

    35.
    发明专利
    未知

    公开(公告)号：AT515888T

    公开(公告)日：2011-07-15

    申请号：AT06817112

    申请日：2006-10-17

    Applicant: QUALCOMM INC

    Inventor： TIAN TAO ,  RAVEENDRAN VIJAYALAKSHMI

    IPC: H04N7/26 ,  H04N5/14 ,  H04N5/44 ,  H04N7/01 ,  H04N7/50

    Abstract: This system adaptively assigns picture types used for temporal compression to frames of streaming video at the input. Based on threshold testing of two metrics that are measures of distance between the frames at the input, a frame may be assigned to be compressed as an I, P, or B frame or be skipped over by the system without being coded at all.

    PROCESAMIENTO DE VIDEO CON ESCALABILIDAD
    37.
    发明专利
    PROCESAMIENTO DE VIDEO CON ESCALABILIDAD 未知

    公开(公告)号：AR061411A1

    公开(公告)日：2008-08-27

    申请号：ARP070101327

    申请日：2007-03-29

    Applicant: QUALCOMM INC

    Inventor： TIAN TAO ,  CHEN PEISONG ,  SHI FANG ,  RAVEENDRAN VIJAYALAKSHMI R

    IPC: H04N7/173

    Abstract: Técnicas de procesamiento de video que hacen uso de elementos de sintaxis y de semántica para soportar las extensiones de complejidad para el procesamiento de multimedia con escalabilidad de video. Los elementos de sintaxis y de semántica pueden ser agregados a las unidades de capa de abstraccion de red (NAL) y pueden ser especialmente aplicables para la difusion de multimedia y definen el formato de corriente de bits y el proceso de codificacion de escalabilidad de video de baja complejidad. En algunos aspectos, es posible aplicar las técnicas con el proposito de implementar extensiones de escalabilidad de video de baja complejidad para dispositivos que, de otro modo, conforman con la norma H.264. Por ejemplo, los elementos de sintaxis y de semántica pueden ser aplicables a las unidades de NAL de conformidad con la norma H.264.

    39.
    发明专利
    未知

    公开(公告)号：NO20075123L

    公开(公告)日：2007-10-23

    申请号：NO20075123

    申请日：2007-10-09

    Applicant: QUALCOMM INC

    Inventor： RAVEENDRAN VIJAYALAKSHMI R ,  TIAN TAO

    IPC: H04N7/26 ,  G06T9/00 ,  H04N7/30 ,  H04N7/50

    Abstract: Methods and apparatus encode video at a targeted bit rate and yet permit variation of a Quantization Parameter (QP) to encode video of varying complexity with relatively consistent visual quality. Constant bit rate (CBR) encoding is desirable in many applications, such as in transmission or broadcasting environments. However, conventional CBR techniques compromise visual quality. Disclosed techniques permit adaptive variation in a QP value and provide the improved visual encoding available in variable bit rate (VBR) schemes while maintaining enough adherence to a targeted bit rate to be applicable to CBR environments.

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